Renewable-crown beater bed



sept. 28 1926., 1,600,986 l C.R.KRANZ RENEWABLE CROWN HEATER BED FiledOct. 9, 1924 AZ?. Sheets-Sheet 1 um i Sept. 28 1926.

C. R. KRANZ Filed oct. 9, 1924 2 sheets-sheet 2 Patented Sept. 23, i926.

UNET STTES een@ PATENT OFQ.

CHESTER RQKRANZ, F CHICAGO HEIGHTS, ILLINOIS, ASSIGNOB. TO AMERICAN MAN-GANESE STEEL COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION 0F MAINE.

RENEWABLE-CROWN BEATER BED.

Application led. Octoberi, 1924. Serial No. 742,525.

The improvements involved in the present invent-ion are in the art ofpaper maklng, and particularly that part of the paper making processwhich has to do with the d1s1n 5 tegration of rags or other material 1nthe preparation of stuff from which the pulp is to be produced. Theinvention resldes 1n an improved construction of bed which coperateswith the rotar beater for the purpose stated, and has for its object toprovide a construction of'beater bed which will lpermit of renewal of aportion of the bed as it wears out, without the necessity of discardingthe whole of the body portion of the bed which i's usually a substantialmetallic mass of considerable cost, and, incidentally, if madeseparately and apart from the crown or wearing portion, can be producedof relatively less expensive metal than the crown. Accordingly, theinvention consists in forming the beater bed for a machine ofsubstantially the character referred to, of a body portion adapted to besupported in the machine in the usual way, or some other suitablemanner, and a crown or top portion separatelyformed and designed to bemounted upon the body portion through means which enables the bodyportion to not only support it but to interlockwith it and hold itagainst displacement in any direction; and, in short, to make vtheassembled body portion and top or crown a unitary structure that isfunctionally the equivalent of the single piece beds heretoforeemployed. The top or crown embodies the teeth, ribs, or other formationwhich render the bed effective in the service for which"l it isintended, thus economizing in the cost of maintenance of the bed, andrendering it economically practicable to produce the effective part ofthe bed of more durable material, such as manganese steel.l

In order that the invention may be fully understood, several embodimentsthereof-,are shown in the accompanying drawings, in

which- Figure 1 is an end elevation of a beater bed embodying one formof the invention.

Figures 2 and 3' are, respectively, Va plan view and a side elevation ofthe same; and Figures 4 to 9, inclusive, are vertical transversesectional views showing various methods `of holdingthe crown orrenewable portion of the bed in assembly with the base lor bed proper.

adapt it to be mounted upon a known construct-ion of beating engine.This body, ac-

-cording to the present invention, is vconstructed with a longitudinalridge A extending substantially throughoutthe length of the body A, andleaving on either side thereof shoulders A2. B represents a crowncorresponding in horizont-al dimensions, approximately, to the body` A,constructed with depending flanges B which adapt the crown to restastride of the rib A, and to be confined Aagainst transversedisplacement relatively thereto after the manner of a saddle. The crownB may rest upon the body A through either its under face B2 or bystepping flanges B upon the shoulders A, or through both said means. Inorder to secure the saddle against vertical or longitudinal displacementon the body A, it is connected with the ridge A through some suitablemeans, such, for instance, as bolts ment of the crown B relatively tothe body A. For instance, as shown in Figure 4, this may consist of awedge bolt D fitted to tapered bores through the crown anges B and theridge'A, and drawn to a firm seating by means of the bolt D. Or, as

.shown in Figure 5,' this may be accomplished by having a bolt E passedvertically through may be employed for prev venting vertical andlongitudinal displacethe crown .B and the ridge A and secured Y bycountersunk nut E. Or, as shown in Figure 6, the elements A and B may besecured together by means of clamp screws F. Or, as shown in Figure 7,the members A and B may be united by sliding-them longitudinally oneupon the other to bring into engagement tongues and grooves G and thusdevelop a. so-called T-head joint. Or,

vention, when the operative portion of a' beater bed becomes worn,broken, or other- -wise impaired, it is merely necessary to release thesecuring means and remove and replace the worn portion. Such a method ofmaintaining beater beds results in a great saving of metal as well astime required in restoringr worn beater beds Ato serviceable condition.The several methods of assembling the crown with the body block allinvolve firm vertical support and transverse interlock in the formationof the two members themselves, in `adidtion to the bolting or othersecuring means, and adapt the crown to withstand the forces which itencounters in' use. Thus in all embodiments of the inventiom'the crownand body are interlocked together to form in effect a structure that issingle and unitary when in use, but separable to render one of itsmembers replaceable when necessary.

While but one particular design of beater prising a base block having aridge, and a bed working surface has been illustrated, it is to beunderstood that the invention applies to any known form of such machineelement.

I claim:

1. In a beater engine, a beater bed comprising a base block constructedwith a ridge, and a wearing crown carrying members through which thebeater bed coacts with the beater; said crown being adapted to rest uponsaid ridge and having flanges through which it embraces said ridgelaterally, and releasable means being provided for securing said crownto said base.

2. In a beater engine, a beater bed com- 3. In a beater engine, a beaterbed comprising a base block constructed with a longitudinal upstandingridge, and a crown constructed with members for coacting with the beaterof the engine and with the depending flanges through which it embracessaidridge, means being provided for interlocking the flanges with theridge comprising means extending from the fianges into the ridge.

4. In a beater engine, a beater bed comprising a base block constructedwith a longitudinal upstanding ridge, and a crown constructed withmembers for coacting with vthe beater of the engine and with thedepending flange, through which it embraces said ridge, means beingprovided for interlocking the flanges with the ridge compris- Ying abolt passing through both flanges and the intervening ridge.

5. In a beater engine, a beater bed comcrown having flanges depending onopposite sidesof said ridge and engaging said ridge throuvh tongue andgroove construction.

l6. Ian a beater engine, ya beater bed comprising a base block having aridge, a crown having flanges depending on opposite sides of said ridgeand engaging said ridge through tongue and groove construction, anl abolt passing through said flanges and r1 ge.

Signed at Chicago Heights, Illinois, this 30th day of September, 1924.

CHESTER R. KRANZ.

